Went to the local chicken swap yesterday and my wife picked up a silkie. They also gave us a freebie mixed breed. So now the 2 freinds are hanging out and chasing bugs and I noticed that they both have a green rubber band on their right leg. Does this mean something important, or is this just a way to "brand" the chicken for ownership? The legbands I've seen on here look like wide flat bands. These look like, well, rubber bands. I can just remove it correct?